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Finding the Fourth Proportional to 18,515.87, 27,773.81 and 10,191.60

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Solution

The fourth proportional to 18,515.87, 27,773.81 and 10,191.60 is: 15,287.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.87 : 27,773.81 = 10,191.60 : x
  2. Step 2: Convert to fraction form
    18,515.87/27,773.81 = 10,191.60/x
  3. Step 3: Cross multiply
    18,515.87x = 27,773.81 × 10,191.60
  4. Step 4: Simplify right side
    18,515.87x = 283,059,605.95
  5. Step 5: Solve for x
    x = 283,059,605.95/18,515.87
  6. Step 6: Final answer
    x = 15,287.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.